Speaker device

Abstract

A speaker device comprises a vibration system, a magnetic circuit system, and an auxiliary system for accommodating and fixing the magnetic circuit system and the vibration system. The vibration system comprises a diaphragm, a centering disk and a voice coil which are joined together. The centering disk comprises a first fixing portion, a second fixing portion provided within the first fixing portion, and a connecting arm connecting the first fixing portion and the second fixing portion. A central position of the second fixing portion is provided with a piezoelectric sheet, the centering disk is provided with a first pad corresponding to the piezoelectric sheet, and the piezoelectric sheet is electrically connected to the first pad. Since a signal emitted by the piezoelectric sheet is mixed with an audio signal emitted by the voice coil-diaphragm, the speaker device of the present invention has improved medium-high frequency effect and acoustic performance.

What is claimed is: 
     
       1. A speaker device, comprising a vibration system, a magnetic circuit system, and an auxiliary system for accommodating and fixing the magnetic circuit system and the vibration system; the vibration system comprises a diaphragm, a centering disk and a voice coil which are joined together; the centering disk comprises a first fixing portion, a second fixing portion provided within the first fixing portion, and a connecting arm for connecting the first fixing portion and the second fixing portion, wherein
 a central position of the second fixing portion is provided with a piezoelectric sheet, the centering disk is provided with a first pad corresponding to the piezoelectric sheet, and the piezoelectric sheet is electrically connected to the first pad, and the centering disk is further provided with a second pad electrically connected to the voice coil, and the first fixing portion is provided with a first external pad and a second external pad, the first external pad electrically coupled with the first pad and the second external pad electrically coupled with the second pad. 
 
     
     
       2. The speaker device according to  claim 1 , wherein the second fixing portion has an annular structure, and an outer periphery of the piezoelectric sheet is fixedly joined with the second fixing portion. 
     
     
       3. The speaker device according to  claim 1 , wherein the diaphragm comprises a fixing portion, a plane portion at the center, and a suspension ring portion connecting the fixing portion and the plane portion; and
 the plane portion is fixedly joined with the second fixing portion of the centering disk. 
 
     
     
       4. The speaker device according to  claim 1 , wherein both the first pad and the second pad are provided at the second fixing portion. 
     
     
       5. The speaker device according to  claim 4 , wherein the piezoelectric sheet is provided at a side of the second fixing portion away from the diaphragm. 
     
     
       6. The speaker device according to  claim 1 , wherein the centering disk is provided with a conductive circuit; and each of the first fixing portion, the second fixing portion and the connecting arm is provided with the conductive circuit. 
     
     
       7. The speaker device according to  claim 1 , wherein the auxiliary system comprises a front cover and a housing. 
     
     
       8. The speaker device according to  claim 7 , wherein the centering disk is fixedly provided between the front cover and the housing.